<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
</head>
<body>
    <form action="" method=post>
        <span>用户名:</span><br>
        <input type="text" name="username"><br>
        <span>密码:</span><br>
        <input type="password" name="password"><br>
        <p><input type="submit" value="登录"></p>
    </form>
</body>
</html>
